|Table of Contents|

Dosimetry comparison of IMRT and VMAT single and double arcing in the treatment of lung cancer

Journal Of Modern Oncology[ISSN:1672-4992/CN:61-1415/R]

Issue:
2019 04
Page:
646-649
Research Field:
Publishing date:

Info

Title:
Dosimetry comparison of IMRT and VMAT single and double arcing in the treatment of lung cancer
Author(s):
Zhou Yunlong1; Xu Jinghui2; Yang Tao3; Li Huichao1
1.Department of Radiation Oncology,Jiangyou Second People's Hospital,Sichuan Jiangyou 621702,China;2.Sichuan Cancer Hospital Physical Room,Sichuan Chengdu 610041,China;3.Department of Radiotherapy,Huangshi Cancer Hospital,Hubei Huangshi 435000,China.
Keywords:
lung cancer; static intensity adjustment treatment; volume adjustment arc treatment; comparison of dosimetry
PACS:
R734.2
DOI:
10.3969/j.issn.1672-4992.2019.04.026
Abstract:
Objective：To study the dosimetric comparison between single and double pull arc technique of volume-modulated arc therapy and static intensity-modulated technique in the treatment planning of early non-small cell lung cancer.Methods：We randomly selected 14 patients with early stage non-small cell lung cancer (NSCLC) and designed IMRT,Plan-d and Plan-s radiotherapy plans respectively.When 95% of the target volume reached the prescribed dose.Comparative analysis of the three plans of ipsilateral lung,contralateral lung,heart and spinal dose distribution,as well as the length of treatment time.Results：The target conformality index (CI) and inhomogeneity index (HI) Plan-d were superior to IMRT (P＜0.05),while Plan-s and IMRT were not significantly different (P＞0.05),while there was no significant difference between Plan-s and IMRT (P＞0.05).The protection of V20 and V10 on the ipsilateral lung was superior to that of IMRT.For the esophageal and cardiac protection,the three treatment techniques did not differ much,but Plan-d and Plan-s protection of the spinal cord was superior to IMRT,the total number of hops (MU) and treatment time (T) Plan-d and Plan-s less than IMRT (P＜0.05).Conclusion：Compared with IMRT in VMAT,there is obvious advantage in the treatment of patients with early non-small cell lung cancer,whether it is the target dose distribution,the protection of OAR or the treatment time (T).Using Plan-d can greatly improve the radiation gain ratio.Plan-s and IMRT techniques are fully capable of meeting clinical requirements if double arcs are not available for other.

References:

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